WSI would not be catering for premium passengers like yourself at this stage, most of the premium flyers will still use SYD.
For me, living in northern Sydney, using Google Maps, it would take me 51 mins to go to WSI, or 43 mins to go to SYD, both using toll roads. So it is not a huge difference in terms of time. You will find that this is the case for many parts of Sydney, where the time difference between WSI and SYD is not that great, especially WSI would be against the traffic.
So I would be happy to fly via WSI and SYD.
